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More than 30 rescue groups took part in the event with dozens of dogs, many of which were adopted.

Several hours into the event, an 8-week-old beagle mix disappeared.

Volunteers said the puppy, named Huckleberry, was last seen in the arms of a woman with long blonde hair, wearing a red shirt and carrying another black and white dog.

Organizers said they are desperate to get the puppy back and to know he is OK.

"We're going to try to get this out as far as we can, put it all over on Facebook. To the person that has the dog -- take it to a safe place, call and let us know where that is. We'll take the dog back, no questions asked," said Jeff Duff with Derby City Dog Rescue.

Derby City Dog Rescue said the person with the dog can take the dog to Dixie Animal Hospital between 9 a.m. and 8 p.m. Monday or contact the organization at 502-322-6681.